Cloudera

Closed . This question is opinion-based . It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post . Closed 3 years ago . I have a Hadoop based environment. I use Flume , Hue and Cassandra in this system. There is a big hype around Docker nowadays, so would like to examine, what are pros and cons in dockerization in this case. I think it should be much more portable, but it can be set using Cloudera Manager with a few clicks. Is it maybe faster or why is worth it? What are advantages? Maybe

正在纽约进行的大数据技术会议 Strata Conference + Hadoop World 传来消息， Cloudera 发布了实时查询开源项目 Impala 1.0 beta版 ，称比原来基于MapReduce的Hive SQL查询速度提升3～90倍 （详情可以参考 此文 中的“ How much faster are Impala queries than Hive ones, really? ”部分） ，而且更加灵活易用。Impala是高角羚的意思，这种羚羊主要分布在东非。 同时，这个项目也将以 Cloudera Enterprise RTQ （Real-Time Query）为名进入CDH发行版。可以部署到生产环境的版本将到2013年一季度就绪。不过，据 ComputerWorld 和 MarketWatch 的报道， Capgemini金融服务、Karmasphere、MicroStrategy、Pentaho、Qlikview和Tableau等已经在Impala上做了几个月的实际产品测试。 众所周知，Hadoop及HBase、HDFS其实是在Google的MapReduce、BigTable和GFS三篇论文的启发下开发出来的。而近年来Google的基础架构又有了一波新的革新，有媒体称之为 后Hadoop时代的三驾马车 Caffeine、Pregel和Dremel

I'm running Cloudera CDH4 with Hbase and Hbase Thrift Server. Several times a day, the Thrift Server crashes. In /var/log/hbase/hbase-hbase-thrift-myserver.out, there is this: # # java.lang.OutOfMemoryError: Java heap space # -XX:OnOutOfMemoryError="kill -9 %p" # Executing /bin/sh -c "kill -9 8151"... In /var/log/hbase/hbase-hbase-thrift-myserver.log, there are no error messages at the end of the file. There are only a lot of DEBUG messages stating that one of the nodes is caching a particular file. I can't figure out any configuration options for the Hbase Thrift Server. There are no obvious

一、准备工作： 1、普通用户root权限准备（sudo，此处用aiot用户，sudoer） groupadd -r test useradd -d /home/test/ -m -s /bin/bash -c "user" -g test -p 2019 -r test #另外特别注意：aiot及密码用户在cloudera manager server中会配置进去，作为集群管理【host添加、agent安装&卸载、parcels管理os user】， 所以不能轻易在os修改aiot用户密码，如果需要修改，运维同学需要通知cdh集群管理员同步修改cms保存的密码） passwd test root： vim /etc/sudoers test ALL=(ALL) NOPASSWD: ALL 2.必备工具 sudo yum install yum-utils createrepo -y sudo yum install ansible -y sudo yum install httpd -y sudo yum install systemctl -y sudo yum install ntp -y sudo yum install hostnamectl -y ~~~~~~~~~~~~~~~~~~~ 3.集群 /etc/hosts设置 sudo vim /etc/hosts cat

CDH 6.3.x 离线安装 环境 CDH 6.3.1 CentOS 7 官方文档 修改主机名，配置host文件 # 根据个人需要修改主机名称 hostnamectl set-hostname node1 hostnamectl set-hostname node2 hostnamectl set-hostname node3 # 修改每个主机的 host 文件 vi /etc/hosts 172.16.1.181 node1 172.16.1.182 node2 172.16.1.183 node3 关闭系统默认安全防护 关闭防火墙 systemctl stop firewalld && systemctl disable firewalld && systemctl status firewalld 关闭SELinux.md ssh 使用密钥登陆 node1 到其他节点即可，配置参考文档： Linux SSH 使用密钥登陆.md 所有节点使用相同的密码，在安装的时候使用密码操作。 机器间时钟同步 所有节点时间必须一致，配置参考文档： Linux 配置时钟同步.md PG数据库 可以选择的数据有多种，这里使用PG，配置参考文档： PostgreSQL 安装之 CentOS 7 x64 RPM 安装.md 注意开启远程访问，使每个节点都能访问到数据库。 注意安装驱动程序。

I am fairly new to both hadoop and docker. I haven been working on extending the cloudera/quickstart docker image docker file and wanted to mount a directory form host and map it to hdfs location, so that performance is increased and data are persist localy. When i mount volume anywhere with -v /localdir:/someDir everything works fine, but that's not my goal. But when i do -v /localdir:/var/lib/hadoop-hdfs both datanode and namenode fails to start and I get : "cd /var/lib/hadoop-hdfs: Permission denied". And when i do -v /localdir:/var/lib/hadoop-hdfs/cache no permission denied but datanode

1.环境 CentOS 7.6 CDH 5.16.1 2.服务器环境准备 1.设置 hostname 和 hosts vim /etc/hostname vim /etc/hosts 2.关闭SELINUX,将SELINUX=enforcing 改为SELINUX=disabled vim /etc/selinux/config 3.配置ssh免密 #1.在新增节点生成公钥 ssh-keygen -t rsa #2.将本机的公钥复制到集群中其他服务器上 cd ~/.ssh ssh-copy-id cdh01 4.设置vm.swappiness=10 cat /proc/sys/vm/swappiness #查看当前值，设置后需要重启才生效 vi /etc/sysctl.conf vm.swappiness=10 #在文件最后增加一行 5.安装Java,Scala 6.配置Java的快捷方式 mkdir /usr/java ln -s /opt/module/jdk1.8.0_144/ /usr/java/default 7.拷贝mysql jar文件到目录 /usr/share/java/ mkdir /usr/share/java/ cp /opt/software/mysql-connector-java-5.1.27/mysql-connector-java-5.1.27